Hi, I am new to M5stack and have bought a Core2 & Stick C plus in the past couple of weeks. Is there a way to find out which revision of the hardware i have. I have found the Stick C plus battery life is short and i have read an article about some revisions did have this as an issue. So was just wondering if there is a way i can find out or do i have a faulty unit. I did buy from a reputable supplier online. Thanks in advance.